Originally Posted by Nobbi
On the return I tried to check in on AS. (All AS flight numbers, the first AA metal). It would not let me, stating we needed to check in with partner airline. I obtained the AA PNR and checked us in on AA.com. It gave us the first segment BPs, not the LAX-SFO ones (they were upgraded tu U). Upon arrival at LAX we had to take the shuttle from the AA to the AA commuter term, then to the NW term, then to the AS term. We got to the gate (barely) in time, no time to stop at the nice BR. I went to the gate agent and told him we needed to pick up our BPs. He asked if we were coming in on AA. My affirmative response got a "so that's why" response. I did not inquire, was glad we still have our seats, and we had a pleasant flight.
I think we were not checked in at all. System glitch?
No, business as usual. I've had itineraries with both airlines on it. AA can't check me in for the AS legs, and with delays in the AA system had a short connection to the AS flights. Flights departed early, without me, since I "wasn't checked in and all checked in passengers were on board." I've since discovered this is much more likely if the AS flight(s) involve cross-border flights (like LAX-YVR).